Edward Anthony Spitzka 59 
The superfrontal fissure is a well-marked one, 7 cm. in length, springing 
from the supercentral and anastomosing with a medifrontal segment. Its 
cephalic termination is bifurcated. 
The medifrontal is represented by three segments. The caudal one 
has been described as anastomosing with the central by means of a pre- 
central element. The middle segment has been described as anastomos- 
ing with the superfrontal. Its ventral limbs curve around a subfrontal 
ramus. The most cephalic piece is of a complex, much-ramified contour, 
anastomosing with the orbitofrontal. b 
The subfrontal springs from the precentral, terminates in a_ simple 
manner at a distance of 2.5 em. from this origin, and in its course anas- 
tomoses with the diagonal. There is one dorsal ramus embraced by the 
limbs of the middle medifrontal segment. Cephalad of this fissure there 
is a zygal fissure which, from its topography, might be interpreted as 
representing an orbitofrontal segment, the radiate, or a subfrontal seg- 
ment. A distinet orbitofrontal exists further mesad, anastomosing with 
the medifrontal. 
MEsIAL SURFACE.—The supercallosal has a total length of 12 em. Ex- 
cept at its caudal end it has few rami. It is possible that the angular 
caudal piece is really a segment of the paracentral with its ramus cephalad 
of the fissure which traverses the dorsi-mesial margin and which possibly 
represents the inflected. In some respects this arrangement resembles 
that noted by the writer in the right hemicerebrum of the assassin Czol- 
gosz. The main part of the paracentral slopes in a nearly straight line 
toward its dorsal terminus. Its cephalic termination is furcal. There 
is a short, independent intraparacentral. 
The frontomarginal is not present. The rostral is 3 em. in length. In 
the callosal gyre, just cephalad of the genu there is a medicallosal fissure, 
running parallel with and between the callosal and supercallosal fissures. 
ORBITAL SURFACE.—The orbital fissural complex may be resolved into a 
guadri-radiate arrangement of which the two caudal limbs form an 
arched transorbital, demarcating the preorbital from the postorbital 
regions. 
The olfactory fissure is simple and 4.2 em. in length. 
GYRES OF THE FRONTAL LOBE (LATERAL SURFACE).—The precentral gyre 
is of regular contour, average width, and interrupted by the vadum 
described as joining the central with the precentral-medifrontal segment. 
The superfrontal gyre is well demarcated, tapers cephalad, and is 
marked by three fissural segments, two of which are distinct paramesials. 
The medifrontal gyre is of notable width, and is marked by numerous 
fissures whose rami tend to a transverse direction. The subfrontal, how- 
ever, is very poorly developed; of small size, unusual configuration, and 
traversed completely by the diagonal. It fails to cover in the insula. 
MeEsIAL SuRFACE.—The mesial surface of the superfrontal gyre is simple 
and unusually narrow. The callosal gyre is of the usual form, except 
cephalad of the genu where it is wider than common, and is marked by a 
medicallosal fissure. The paracentral, meaning so much as is defined of 
it, is small. 
